Sarnia
October
Weather in Sarnia for October 2025
Your guide to Sarnia weather in October - trends and predictions
In general, the average temperature in Sarnia at the beginning of October is 21.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.6 °C by the end of October.
Expect significant rainfall in Sarnia during October, with an average of 17 rainy days.
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14
Dry days
17
Rainy days
0
Snow days
15°/8°
Temperatures
24 km/h
Avg max wind
74 %
Avg humidity
Sarnia in October average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2 23° | 3 24° | 4 24° | 5  23° | ||
| 6  21° | 7 14° | 8 13° | 9 14° | 10  13° | 11 17° | 12 15° |
| 13 14° | 14  10° | 15 10° | 16 11° | 17 15° | 18  18° | 19  18° |
| 20 18° | 21 18° | 22 16° | 23 14° | 24 17° | 25 16° | 26 16° |
| 27 16° | 28 15° | 29 14° | 30 13° | 31 12° |
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Temperatures trend during October in Sarnia
See the weather trend as well as the moving average line
October weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Oct. | Fog | 23° /12° | 4.5 mm | 5 | |
| 2 Oct. | Fog | 23° /11° | 0 mm | 5 | |
| 3 Oct. | Fog | 24° /9° | 0 mm | 6 | |
| 4 Oct. | Fog | 24° /13° | 0 mm | 5 | |
| 5 Oct. | Light drizzle | 23° /12° | 0.9 mm | 5 | |
| 6 Oct. | Light rain shower | 21° /10° | 6.2 mm | 5 | |
| 7 Oct. | Patchy rain possible | 14° /7° | 0.3 mm | 4 | |
| 8 Oct. | Light rain shower | 13° /4° | 0.5 mm | 4 | |
| 9 Oct. | Patchy rain possible | 14° /3° | 0 mm | 4 | |
| 10 Oct. | Overcast | 13° /6° | 0 mm | 3 | |
| 11 Oct. | Patchy rain possible | 17° /6° | 0.2 mm | 4 | |
| 12 Oct. | Patchy rain possible | 15° /8° | 1 mm | 4 | |
| 13 Oct. | Overcast | 14° /8° | 0 mm | 3 | |
| 14 Oct. | Heavy rain | 10° /7° | 15.4 mm | 3 | |
| 15 Oct. | Light rain shower | 10° /6° | 23.7 mm | 3 | |
| 16 Oct. | Patchy rain possible | 11° /7° | 3.2 mm | 3 | |
| 17 Oct. | Overcast | 15° /4° | 0 mm | 4 | |
| 18 Oct. | Cloudy | 18° /5° | 0 mm | 5 | |
| 19 Oct. | Moderate rain | 18° /7° | 2.7 mm | 4 | |
| 20 Oct. | Light rain shower | 18° /7° | 1 mm | 5 | |
| 21 Oct. | Patchy rain possible | 18° /8° | 0.1 mm | 5 | |
| 22 Oct. | Patchy rain possible | 16° /7° | 0.1 mm | 5 | |
| 23 Oct. | Patchy rain possible | 14° /4° | 0 mm | 4 | |
| 24 Oct. | Patchy rain possible | 17° /5° | 0.3 mm | 5 | |
| 25 Oct. | Light drizzle | 16° /8° | 1.8 mm | 4 | |
| 26 Oct. | Light rain | 16° /10° | 1.5 mm | 5 | |
| 27 Oct. | Patchy rain possible | 16° /10° | 1.3 mm | 5 | |
| 28 Oct. | Overcast | 15° /6° | 0.1 mm | 4 | |
| 29 Oct. | Light rain | 14° /6° | 17.9 mm | 4 | |
| 30 Oct. | Patchy rain possible | 13° /8° | 1.1 mm | 3 | |
| 31 Oct. | Overcast | 12° /5° | 0.5 mm | 3 | |
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Important Notice
Our weather forecast for Sarnia in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sarnia forecast closer to your planned date for the most up-to-date weather information.
Sarnia in October - FAQ
What are the expected maximum and minimum temperatures in Sarnia during October?
During October, expect a variety of temperatures with highs around 15° and lows near 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in Sarnia during October?
Moderate rainfall is anticipated in Sarnia during October, with a total of 75.4 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Sarnia during October?
The average wind speed in Sarnia during October is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Sarnia
Explore the daily rainfall trends and prepare for Sarnias October weather 💧
UV exposure in Sarnia during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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